Quote:
|
Originally Posted by marko96
Hi, My 1997 Sportage has suddenly decided to run very rough it does clear above 2000rpm but is noticably down on power i have changed the spark plugs but this has made no differance whats next check the coils? if a coil breaks down does it affect both spark plugs that it supplies or can it just affect one? compression check after that? it does sound to be off one cylinder.  |
For clarity, is yours a single overhead cam or double overhead cam?
What sort of plugs did you put in, and was it playing before or after you fitted them?
There have been instances (quite a few) where Bosch +4 plugs cause the engine to misfire. Not recommended for this engine. Go the original spec NGK's, there is nothing to be gained from anything else.
Do you have the "Check Engine Light" on, or flashing? Have you read the error codes (if any)? If you post them here we may be in a better position to help.
TroubleCodes.net- engine & OBD2 Trouble Codes and Technical info & Tool Store.
If a coil goes it will
usually cause both plugs to misfire, unless it is something on the outside of the coil pack (ie cracked plastic one end)
If you decide to do the coils anyway, replace the leads as well, and then at least you know everything
should work properly. (saves pulling it down a third time.)